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Preface to the special issue on energy utilization and conservation

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Journal of Central South University 2019年第8期26卷 2019-2020页

作者： liao sheng-ming SUN Zhi-qiang ZHOU Chenn School of Energy Science and Engineering Central South University Changsha 410083 China Center for Innovation through Visualization and Simulation Purdue University Northwest Hammond IN 46323 USA

Energy utilization and conservation are seen as important solutions to energy crisis and environmental pollution. New technologies, such as renewable energy utilization, high-efficiency conversion, energy management, ... 详细信息

关键词： conservation solutions industry

Investigation on porous frequency of regenerator of microminiature thermoacoustic refrigerator

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Journal of Central South University of Technology 2005年第z1期12卷 253-255页

作者： LIU Yi-cai ZHOU Jie-min ZHOU Nai-jun liao sheng-ming School of Energy and Power Engineering Central South University Changsha 410083 China School of Energy and Power Engineering Central South University Changsha 410083 China School of Energy and Power Engineering Central South University Changsha 410083 China School of Energy and Power Engineering Central South University Changsha 410083 China

A new method was proposed to directly measure the effective resistance and distinguish the porous frequency in the regenerator of the microminiature thermoacoustic refrigerator. Measured results were compared with the flux gain factor and transmission loss of the real system. The results show that the agreement between the range of the porous frequency and frequency of the system is good, the method can be used to predict the porous frequency of the regenerator in production.

关键词： porous frequency microminiature thermoacoustic regenerator

Hybrid LEAP modeling method for long-term energy demand forecasting of regions with limited statistical data

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Journal of Central South University 2019年第8期26卷 2136-2148页

作者： CHEN Rui RAO Zheng-hua liao sheng-ming School of Energy Science and Engineering Central South University

An accurate long-term energy demand forecasting is essential for energy planning and policy making. However, due to the immature energy data collecting and statistical methods, the available data are usually limited in many regions. In this paper, on the basis of comprehensive literature review, we proposed a hybrid model based on the long-range alternative energy planning (LEAP) model to improve the accuracy of energy demand forecasting in these regions. By taking Hunan province, China as a typical case, the proposed hybrid model was applied to estimating the possible future energy demand and energy-saving potentials in different sectors. The structure of LEAP model was estimated by Sankey energy flow, and Leslie matrix and autoregressive integrated moving average (ARIMA) models were used to predict the population, industrial structure and transportation turnover, respectively. Monte-Carlo method was employed to evaluate the uncertainty of forecasted results. The results showed that the hybrid model combined with scenario analysis provided a relatively accurate forecast for the long-term energy demand in regions with limited statistical data, and the average standard error of probabilistic distribution in 2030 energy demand was as low as 0.15. The prediction results could provide supportive references to identify energy-saving potentials and energy development pathways.

关键词： energy demand forecasting with limited data hybrid LEAP model ARIMA model Leslie matrix Monte-Carlo method

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InSAR技术在监测形变中的干涉条件分析

地球物理学报 2013年第3期56卷 812-823页

作者：田馨廖明生武汉大学测绘遥感信息工程国家重点实验室武汉430079

针对InSAR技术在形变监测领域中的应用,本文从分析D-InSAR的干涉机理对其约束条件出发,重点研究空间去相关和形变梯度这两个关键指标对形变信息提取的影响.研究针对不同系统参数的传感器来展开,并论证这两个因素对干涉测量的限制.本文... 详细信息

针对InSAR技术在形变监测领域中的应用,本文从分析D-InSAR的干涉机理对其约束条件出发,重点研究空间去相关和形变梯度这两个关键指标对形变信息提取的影响.研究针对不同系统参数的传感器来展开,并论证这两个因素对干涉测量的限制.本文的创新性工作主要集中在以下几个方面:(1)分析了各传感器参数下的临界坡度范围,进而确立了SAR传感器监测的无信息区域;(2)证明了在植被覆盖区,相干性分解必须考虑体散射分量,并依此对模型进行了修正;(3)明确了形变梯度与相位梯度的差异以及两者的函数关系,并将入射角引入形变梯度函数模型.(4)通过模拟数据和真实数据比较各传感器在不同条件下形变监测的优缺点,在统计分析的基础上进一步验证结论.本文的研究是对干涉测量条件的进一步补充,对于理解干涉成像机理、完善InSAR数值计算模型(形变梯度模型和相干性分解模型)以及帮助研究人员根据研究区域特征选择合适的InSAR数据具有一定的参考价值.

关键词： D-InSAR技术形变监测干涉约束传感器参数

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精确提取InSAR时间去相关分量的方法

红外与毫米波学报 2016年第4期35卷 454-461页

作者：田馨廖明生东南大学交通学院测绘工程系江苏南京210096 武汉大学测绘遥感信息工程国家重点实验室湖北武汉430079

提出了一种干涉合成孔径雷达(InSAR,Synthetic Aperture Radar Interferometry)回波信号时间去相关分析的新方法,该方法主要包括三个步骤:采用自适应区域增长算法(IDAN,Intensity-Driven Adaptive Neighborhood)估计所有干涉子集的相干性;利用迭代最小二乘去除估计量偏差;采用相干性分解技术对无偏样本相干性进行分离,获得精确的时间去相关分量.以美国南加州洛杉矶地区的ENVISAT ASAR数据集为例,对新方法和现有方法进行了比较研究.结果表明,新的融合算法能够获得更加可靠、精度更高的时间去相关分量,并具有非阈值和近乎完全的自适应性.本文的研究将有利于改善与时间相干性有关的地球物理参数反演,也有利于地表变化周期性和随时间变化的气候环境实时监测等.

关键词：合成孔径雷达干涉测量相干性估计相干性分解时间去相关分析

Effect of obstruction on thermal performance of solar water heaters

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Journal of Central South University 2020年第4期27卷 1273-1289页

作者： LI Da-peng WANG Yu-fan LIU Gang liao sheng-ming LIU Xian-ping School of Mechanical and Electrical Engineering Central South University of Forestry and TechnologyChangsha 410004China School of Energy Science and Engineering Central South UniversityChangsha 410083China School of Civil Engineering Hunan University of Science and TechnologyXiangtan 411201China

Solar water heaters(SWH) are widely used in urban areas because of their advantages in reducing energy consumption and mitigating greenhouse gas emissions. However, the performance of SWH subjected to obstructions is unclear yet. In this study, we present a numerical evaluation on thermal performance of fa?ade-installed SWH under three typical obstructed scenarios, based on various levels of sunshine duration. This study is carried out for four locations with various latitudes across China. Thermal performance is measured by solar fraction for annual and monthly evaluation. The results show that the obstruction can seriously degrade annual solar fraction of SWH, even in the 4-hour sunshine duration scenario, for all the studied locations. Interestingly, only lengthening sunshine duration in the standard day(e.g., from 2 h to 4 h) may not result in increasing annual solar fraction markedly. In terms of the monthly performance, solar fraction in January and December decreases significantly, while from May to August it just declines slightly, except for Guangzhou having a swift reduction. This study can provide insights into the behavior and promote the appropriate application of SWH in urban areas.

关键词： solar water heaters thermal performance obstruction simulation

多年冻土区天然地面耦合热管的数值传热分析及优化

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中国铁道科学 2006年第6期27卷 1-6页

作者：王金良廖胜明中南大学制冷空调研究所湖南长沙410075

为了青藏铁路多年冻土路基耦合热管优化设计的需要,建立多年冻土区天然地面耦合热管的相变传热模型,利用该模型研究不同热管管径、气候条件和冷凝段与蒸发段长度比对热管传冷量的影响。结果表明:大管径的热管对于提高热管的传冷量是有利... 详细信息

为了青藏铁路多年冻土路基耦合热管优化设计的需要,建立多年冻土区天然地面耦合热管的相变传热模型,利用该模型研究不同热管管径、气候条件和冷凝段与蒸发段长度比对热管传冷量的影响。结果表明:大管径的热管对于提高热管的传冷量是有利的;在冷凝段与蒸发段长度比大于0.9的条件下,热管传冷量随长度比增大得并不明显,因此建议优化的冷凝段与蒸发段长度比取为稍大于0.9的值;与年平均气温较高的多年冻土区相比,年平均气温较低的多年冻土区更有利于热管的传冷。对比模型计算值和现场实验值表明,提出的模型与实际拟合良好。

关键词：热管数值传热分析优化设计多年冻土

青藏高原低气压旅客列车车厢速度场及温度场的数值模拟研究

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铁道学报 2013年第10期35卷 18-23页

作者：陈宁廖胜明饶政华中南大学能源科学与工程学院湖南长沙410083

在简化青藏铁路N917次列车路线的基础上,计算列车车厢在沿线主要站点不同朝向的夏季空调室外综合温度分布;基于RNGk-!模型,采用计算流体力学软件(CFD),建立25T型客车简化CFD模型,进行低气压高原列车速度场和温度场分布的气流组织预测。... 详细信息

在简化青藏铁路N917次列车路线的基础上,计算列车车厢在沿线主要站点不同朝向的夏季空调室外综合温度分布;基于RNGk-!模型,采用计算流体力学软件(CFD),建立25T型客车简化CFD模型,进行低气压高原列车速度场和温度场分布的气流组织预测。结果表明,沿列车纵向相同座位间隔的空间上速度和温度分布类似:在靠近阳面侧壁上部和两个送风口之间靠近走廊地面的局部位置形成较大的涡流,沿着两侧壁和乘客上方有强烈的上升气流;垂直方向上有明显的温度分层现象,靠近车顶和侧壁的区域温度较高而车厢中心和车厢底部的温度较低。对列车经过两个不同海拔为2 832m和4 685m的速度和温度场比较发现,车厢内各个位置的速度变化很小,局部点最大幅度不超过±0.1m/s;除了靠近阴面侧壁的位置温度略有下降以外,其他座位位置的温度略有上升,而车厢回风口的温度略减,下降幅度不超过0.5℃。

关键词：青藏高原低气压旅客列车计算流体力学

嵩屿电厂电除尘器电控部分常见故障分析及处理

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热力发电 2005年第12期34卷 103-103,108页

作者：廖生明嵩屿电厂福建厦门361026

Directing against problems existing in static precipitator of Songyu Power Plant, such as degradation of equipment, unreasonable design, comparatively higher failure rate, the rate of putting electric field into service can’t reach 100%, and reduced efficiency of the precipitator etc., the retrofit of control part for rectifying, voltage boosting, and rapping system has been carried out, and obtaining remarkable effectiveness.

关键词：静电除尘器嵩屿电厂分析及处理常见故障电控部分燃煤发电机组升压系统控制部分 300MW 供电可靠性